An intercepted feedback mode for light sensitive spectroscopic measurements in atomic force microscopy

被引：14
作者：
Smoliner, J. [1 ]
Brezna, W. [1 ]
机构：
[1] TU Wien, Inst Festkorperelektron, A-1040 Vienna, Austria
来源：
REVIEW OF SCIENTIFIC INSTRUMENTS | 2007年 / 78卷 / 10期
基金：
奥地利科学基金会;
关键词：
D O I：
10.1063/1.2794062
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
In most atomic force microscopes (AFMs), the motion of the tip is detected by the deflection of a laser beam shining onto the cantilever. AFM applications such as scanning capacitance spectroscopy or photocurrent spectroscopy, however, are severely disturbed by the intense stray light of the AFM laser. For this reason, an intercepted feedback method was developed, which allows to switch off the laser temporarily while the feedback loop keeps running. The versatility of this feedback method is demonstrated by measuring tip-force dependent Schottky barrier heights on GaAs samples. (C) 2007 American Institute of Physics.
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页数：3
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